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Rona Joharmi Nainggolan
Program Studi ILmu Dan Teknologi Pangan Fakultas Pertanian USU
Agriculture, Biological Sciences & Forestry Engineering

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Study On The Addition Of Taro, Mung Bean, Wheat Flours On The Quality Of Cookies Wita Dola Rista Sidabutar; Rona Joharmi Nainggolan; Ridwansyah Ridwansyah
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The research was aimed to investigate the effect of addition of taro and mung bean flours on the quality of cookies. The reseach had been performed using factorial completely randomized design, with one factor i.e : taro flour, mung bean flour and wheat flour (T): 70%:0%:30%, 60%:10%:30%, 50%:20%:30%, 40%:30%:30%, 30%:40%:30%, 20%:50%:30%, 10%:60%:30%, 0%:70%:30%. Parameters analyzed were water content, ash content, fat content, protein content, fiber content, cookies crispy test with instrometer and organoleptic values (flavor, taste and texture).The result showed that the ratio of taro flour, mung bean flour and wheat flour had significant effect on all parameters.The 70%:0%:30% composition produced the best cookies in organoleptic values. . Key words : Taro flour, mung bean flour, wheat flour,cookies
The Effect of The Addition of Natural Preservative Substance Concentration of Arenga pinnata Sap During Storage on the Quality of Liquid Palm Sugar Ricky Fauzi Lubis; Rona Joharmi Nainggolan; Mimi Nurminah
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The research was conducted to determine the effect of the addition of natural preservative substance concentration of Arenga pinnata sap during storage on the quality of liquid palm sugar. The research had been performed using a completely randomized design with two factors, i.e. natural preservative substance concentration which is jackfruit stalk (N) : (2%), (4%), (6%), and (8%) and storage time (L) : (0, 1, 2, and 3 days). Parameters analyzed were pH, total acid, total sugars, total soluble solid (TSS) of Arenga pinnata sap, sensory characteristics (color and aromatic) of Arenga pinnata sap, TSS of liquid palm sugar, yield, sensory characteristics (color, aromatic, and flavor) of liquid palm sugar. The results showed that the natural preservative substance concentration had highly significant effect on all parameters. Storage time had highly significant effect on all parameters. Interaction of both factors had highly significant effect on TSS of Arenga pinnata sap, sensory characteristics color of Arenga pinnata sap, and TSS of liquid palm sugar, had significant effect on pH and total acid, and had no significant effect on total sugars, sensory characteristics aromatic of Arenga pinnata sap, yield, and sensory characteristics (color, aromatic, and flavor) of liquid palm sugar. Natural preservative substance concentration of 6% was the best treatment for the quality of liquid palm sugar. Key words : Arenga pinnata sap, natural preservative substance, liquid palm sugar, storage time
The Effect of Ratio of Noni and Pineapple Juices and Heating Time on Quality of Mix Noni Candy Melina Sianturi; Rona Joharmi Nainggolan; Linda Masniary Lubis
Jurnal Rekayasa Pangan dan Pertanian Vol 2, No 1 (2014): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The research was conducted to determine the effect of ratio of noni and pineapple juices and heating time on the quality of mix noni candy. This research was conducted using completely randomized design with two factors, i.e. : the ratio of noni and pineapple juices (S) (70% : 30%; 60% : 40%; 50% : 50%; 60% : 40%) and heating time (L) (20 minutes, 25 minutes, 30 minutes, 35 minutes). Parameters analyzed were moisture content (%), ash content (%), vitamine C content (mg/100 g ingredient), total acid (%), total soluble solid (o Brix), organoleptic values of color, flavor, taste and texture. The results showed that the effect of ratio of noni and pineapple juices had highly significant effect on moisture content (%), ash content (%), vitamine C content (mg/100 g ingredient), total acid (%), total soluble solid (o Brix), organoleptic values of color, flavor, taste and texture. The heatingtime had highly significant effect on moisture content (%), ash content (%), vitamine C content (mg/100 g ingredient), total acid (%), total soluble solid (o Brix), organoleptic values of color, flavor, taste and texture. Interactions of the two factors had highly significant effect on moisture content, total acid (%), total soluble solid (o Brix), organoleptic values of color, flavor and taste and had significant effect on ash content (%),vitamine C content (mg/100 g ingredient) and organoleptic values of texture. ratio of noni and pineapple juices of (60% : 40%) and time of heating of (30 minutes) resulted in the best and more acceptable quality of mix noni candy. . Key words : Candy, Heating Time, Noni, Pineapple
Effect of the addition of red beans and arabic gum on the quality of corn milk Misail Meliala; Ismed Suhaidi; Rona Joharmi Nainggolan
Jurnal Rekayasa Pangan dan Pertanian Vol 2, No 1 (2014): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

This study was conducted to determine the process of making of corn milk with the addition of red beans and arabic gum. This research was conducted using a completely randomized design with two factors, namely the number of red beans; 0%, 10%, 20% and 30% of the weight of the corn and the concentration of arabic gum ; 0%, 0,1%, 0,2% and 0,3%. The parameters analyzed were fat content, protein content, total solids, viscosity, pH, organoleptic of color, aroma and flavor. The results showed that the amount of red bean had highly significant effect on levels of protein, total solids, viscosity and aroma and had no significant effect on fat content, pH, color and flavor. Concentration of arabic gum had highly significant effect on total solids and viscosity, and had significant effect on protein content and had no different effect on fat content, pH, organoleptic color, aroma and flavor. Interaction of the amount of red bean and arabic gum had highly significant effect on total solids and viscosity, and had no significant effect on fat content, protein content, pH, organoleptic color, aroma and flavor. Amount of red beans of 30% and 0,3% of arabic gum produced the best quality of corn milk. Keywords: arabic gum, corn milk, red beans.
Washing Methods and Filtration on the Extraction of Durian Peel Pectin Karen Darmawan; Rona Joharmi Nainggolan; Lasma Nora Limbong
Jurnal Rekayasa Pangan dan Pertanian Vol 2, No 2 (2014): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

This research was aimed to know the washing methods and filtration thickness on the quality of pectin extracted from durian peel and to increase economic value on durian peel waste. This research was conducted using a completely randomized design with two factors, namely the washing methods; washed and unwashed with alcohol and filtration thickness: 1 piece, 2 pieces, 3 pieces, 4 pieces, 5 pieces, and 6 pieces. The parameters analyzed were yield, water content, ash content, equivalent weight, methoxyl content, galacturonic content and color. The results showed that the washing methods had highly significant effect on yield, water content, and colors and had significant effect on ash content and provided no effect on equivalent weight, methoxyl content, galacturonic content. Filtration thickness gave highly significant effect on yield, water content, ash content, equivalent weight, methoxyl content and galacturonic content. Interactions of the two factors gave highly significant effect on yield and color and had significant effect on ash content and provided no effect on water content, equivalent weight, methoxyl content and galacturonic content. Washing with alcohol and filtration thickness of 6 pieces produce the best quality of durian peel pectin. Keywords: durian peel, filtration thickness, pectin, washing methods.
Co-Authors Ismed Suhaidi Karen Darmawan Lasma Nora Limbong Linda Masniary Lubis Melina Sianturi Mimi Nurminah Misail Meliala Ricky Fauzi Lubis Ridwansyah Ridwansyah Wita Dola Rista Sidabutar